/*
* Copyright 2012 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.handler.codec.sctp;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import io.netty.channel.sctp.SctpMessage;
import io.netty.handler.codec.CodecException;
/**
* A ChannelHandler which receives {@link SctpMessage}s which belong to a application protocol form a specific
* SCTP Stream and decode it as {@link ByteBuf}.
*/
public class SctpInboundByteStreamHandler extends ChannelInboundMessageHandlerAdapter<SctpMessage> {
private final int protocolIdentifier;
private final int streamIdentifier;
/**
* @param streamIdentifier accepted stream number, this should be >=0 or <= max stream number of the association.
* @param protocolIdentifier supported application protocol.
*/
public SctpInboundByteStreamHandler(int protocolIdentifier, int streamIdentifier) {
this.protocolIdentifier = protocolIdentifier;
this.streamIdentifier = streamIdentifier;
}
@Override
public final boolean acceptInboundMessage(Object msg) throws Exception {
if (super.acceptInboundMessage(msg)) {
return acceptInboundMessage((SctpMessage) msg);
}
return false;
}
protected boolean acceptInboundMessage(SctpMessage msg) {
return msg.protocolIdentifier() == protocolIdentifier && msg.streamIdentifier() == streamIdentifier;
}
@Override
public void messageReceived(ChannelHandlerContext ctx, SctpMessage msg) throws Exception {
if (!msg.isComplete()) {
throw new CodecException(String.format("Received SctpMessage is not complete, please add %s in the " +
"pipeline before this handler", SctpMessageCompletionHandler.class.getSimpleName()));
}
ctx.nextInboundByteBuffer().writeBytes(msg.data());
ctx.fireInboundBufferUpdated();
}
}